These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
Putin says can't rule out running for re-election in 2018. VALDAI, Russia. Sept 19 (Interfax) - Russian President Vladimir Putin said on Thursday he couldn't rule out running for re-election as president in 2018. Putin made the statement during an exchange with former French Prime Minister Francois Fillon at a meeting of the Valdai discussion club.